EP2710523B1 - Radiofrequency transponder device with passive resonant circuit - Google Patents
Radiofrequency transponder device with passive resonant circuit Download PDFInfo
- Publication number
- EP2710523B1 EP2710523B1 EP12720528.4A EP12720528A EP2710523B1 EP 2710523 B1 EP2710523 B1 EP 2710523B1 EP 12720528 A EP12720528 A EP 12720528A EP 2710523 B1 EP2710523 B1 EP 2710523B1
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- European Patent Office
- Prior art keywords
- antenna
- transponder
- intended
- recess
- passive antenna
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- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 238000004049 embossing Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 description 10
- 238000004891 communication Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000032798 delamination Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07775—Antenna details the antenna being on-chip
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07794—Antenna details the record carrier comprising a booster or auxiliary antenna in addition to the antenna connected directly to the integrated circuit
Definitions
- Radio transponder device with optimized passive resonant circuit Radio transponder device with optimized passive resonant circuit.
- the invention relates to the field of passive antenna radio frequency transponders and the structure of these radio frequency transponders.
- the invention relates to contactless chip carriers such as contactless smart cards whose communication is amplified by a passive antenna.
- the invention may also be directed to contactless electronic travel document systems such as electronic passports and electronic visas in the form of transponders arranged together.
- these documents and visas comply with the specifications of ICAO (acronym for the English expression "International Civil Aviation Organization") and ISO / IEC 14443.
- the document US 6,378,774 illustrated at Figures 1 and 2 discloses a smart card comprising an integrated circuit module (2) with contact and antenna communication interfaces.
- the card body comprises a passive antenna which comprises two coils (3, 4) connected in parallel with a capacitance, a closed wide coil being able to be disposed substantially at the periphery of the card body and a narrow coil arranged centered with the antenna of the module.
- the wide coil has the function of communicating with an external reader and the narrow loop has the function of coupling and communicating with the module.
- the document US5955723 illustrated at figure 3 discloses a data carrier comprising an integrated circuit 16 connected to a first conductor loop 18, at least a second coupling surface conducting loop 14 corresponding approximately to that of the support and a third loop 13 belonging to the second loop and having approximately the dimensions of the first loop.
- the first and third loops are arranged substantially concentrically and are coupled together.
- the third loop is open to the outside; It corresponds to a recessed hollow or concave portion of the first loop coming from the outside towards the inside of the coupling surface delimited by the internal surface of the antenna 14.
- the support obtained has the disadvantage of requiring a passive antenna whose main loop extends over the entire periphery of the support.
- the constructions described do not achieve a target level of performance in accordance with ISO / IEC 14443.
- SPS Smart Card Solutions
- This module is coupled with a passive antenna disposed on almost the entire surface of the card body; It comprises substantially concentric loops arranged spirally around the module cavity; The first loop adjacent to the cavity being very wide by several millimeters under the location of the module cavity or even 5 mm and the following also to allow embossing on the turns without risk of cutting the turns to the embossing.
- the antenna is connected to metal capacitor plates disposed on either side of the antenna support. The last turn extends in the periphery of the card to embrace the most radiofrequency flow of a player.
- This construction has the disadvantage of presenting risks of delamination insofar as the plastic sheets constituting the card body adheres poorly to the metal surfaces of the turns of the antenna and / or capacitor plates.
- the invention aims to solve the aforementioned drawbacks.
- the passive antennas are respectively referenced (3, 4) and (13, 14). They respectively comprise a small loop (3, 13) and a large loop (4, 14).
- the electromagnetic flux induced inside the loop 14 is opposite to that induced in the loop 13 and may affect the effectiveness of the electromagnetic coupling.
- a radiofrequency device 1A according to the invention (without illustration of a frequency tuning capacity connected in principle to the terminals of the antenna).
- This device is here in the example a contactless and / or contactless smart card in accordance with ISO 7816 and ISO / IEC 14443. It can constitute an electronic passport or other contactless object such as a electronic tag, a badge, a ticket, etc.
- the device comprises a passive antenna 24 tuned or intended to be tuned in frequency with at least one radiofrequency transponder 22 or 22B;
- the transponder comprises a radiofrequency integrated circuit chip 16 connected to an antenna interface 28 or 36 (here schematized).
- An outer coil 29 of the antenna interface 28 defines a periphery P of the electromagnetic coupling surface of the transponder;
- the module also comprises an internal coil 30.
- the transponder may be in the example a dual interface module 22 (antenna and contact pads 36 on the surface of the card body) or a smart card non-contact module 22b ( Fig. 7B ).
- transponder is understood to mean any electronic radio-frequency circuit communicating with the aid of an electromagnetic field and comprising a coil connected to a capacitor and / or to an integrated circuit.
- Transponders are used in different economic fields such as banking (electronic purse), communication, transport, identity (e-passport, ID-card). In the particular identity, it is known to perform the identification of a person by radio frequency communication with a contactless electronic object RFID-type contact.
- the module may or may not include an insulating substrate supporting the contact pads and / or the antenna.
- the passive antenna can be made on an insulating substrate by any technique known to those skilled in the art including by embedding antenna wire, by etching, by screen printing. In the example, the antenna is etched.
- the passive antenna 24 comprises a single main loop formed of at least one or more turns; It comprises at least one surface portion (A) inside the loop for electromagnetic coupling with at least one transponder circuit.
- turns of the passive antenna 24 extend or are intended to extend substantially near and along the interface 28 modules on more than half of their periphery (P). That is to say that a portion of the turn of the turns of the passive antenna 24 defining the recess accompanies very closely and / or is substantially parallel to the path of the turns of the antenna interface 28 of the transponder over at least a distance corresponding to half the length of the peripheral turn (29) P.
- the antennas 24 and 28 are arranged in close proximity to one another, for example, separated by less than one millimeter. In other devices for example USB keys, telephone, this proximity may be greater for example of the order of a few millimeters or even one or more centimeters.
- the antenna 24 extends over a half-surface of a chip card body 10 with dimensions ISO 7816.
- the recessed portion of the passive antenna is in the form of a supine letter "U” or the letter “C”; The portion here forms a stall of the passive antenna 24 extending to a location 37 of the module to come to encompass or bypass this location.
- the radiofrequency communication of the card with a reader is improved and can be in accordance with the ISO / IEC 14443 standard with just half the surface of an ISO 7816 standard smart card.
- the electromagnetic flux induced in the surface (A) has the same direction as that induced in the surface B of the recess.
- the passive antenna can extend substantially over the entire length of the card even beyond the module (left in the figure).
- the corner R is in the form of the letter "C".
- the overlap between main antenna 24 and antenna interface 28 is performed respectively on three of their perpendicular adjacent sides Cp, Dp, Ep and Cm, Dm, Em, as shown in FIG. figure 5 .
- a plurality of turns of the passive antenna extend or are intended to extend over three quarters or more of the periphery of the antenna interface 28 of the module.
- the passive antenna can surround a little more the transponder or the location 37 by a complementary portion without however completely close the surface B and isolate it from the surface A.
- the passive antenna can be connected to two capacitor plates C1, C2 for example made on either side of the antenna substrate (alternatively, the capacitance can be achieved by an integrated circuit chip).
- a stud 40 fixed on either side of the substrate allows their piercing and deformation to connect the two plates, themselves connected to the ends of the passive antenna.
- the passive antenna comprises, in the recess R, an internal turn 33 widened towards the perpendicular bisector of the recess R.
- the advantage is to be able to possibly machine a module cavity with wide manufacturing tolerances without the risk of cutting the inner turn of the antenna 24 or 34 at the nook; It is possible to provide several cavity dimensions with the same passive antenna profile. The widening of the coil is here only in this recess covered by the antenna of the transponder.
- the invention provides to achieve serial capabilities by multiplying the superimposed plates.
- These plates or grids can be formed with a continuous path of a wire.
- the invention provides for making plates or grids superimposed on the path of antenna turns.
- a series of capacitors is obtained, either by superimposing at least three grids, or by making at least two capacitors on a path of the same turn (or the same conductive track if no antenna).
- the wire guiding tool on the substrate makes a plate in zigzag or any grid shape, then the wire of a second or subsequent turn of turn turns the second plate and / or other subsequent plates to have capacitors in series with each other.
- the invention provides for making the second plate or nth plate in the wake of the first with a continuous wire, for example by ironing the wire on the grid which has just been formed before continue the antenna route.
- the stacked capacitor grids can be adjusted by cutting a wire according to the desired capacitance value. For example, if a terminal gate portion is uncoupled from the circuit by severing a wire at a point in the grid or leading to the gate, then that capacitance is disabled. Another example, if a terminal portion of grid contains N lines crossing N other lines as at figure 3 , the invention provides for cutting a wire, preferably at the level of lines at the edge of the grids or at a distance from the grids. The invention provides a correspondence table, between "N" lines deleted and the corresponding capacity value removed.
- the table below shows the results obtained with a passive antenna according to the figure 8 and a module substantially in accordance with the Figure 7B .
- the module used for testing may be in accordance with a standard SPS module. These values more than satisfy the ISO 14443 standard with only half of the antenna area, contrary to the prior art for a passive antenna product type.
- the invention makes it possible to have a universal antenna for three possible uses: a version with two modules, a version with a single module with dual interface and a version with a contactless module.
- a version with two modules a version with a single module with dual interface
- a version with a contactless module a version with a contactless module.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Near-Field Transmission Systems (AREA)
- Support Of Aerials (AREA)
Description
Dispositif transpondeur radiofréquence à circuit résonant passif optimisé.Radio transponder device with optimized passive resonant circuit.
L'invention concerne le domaine des transpondeurs radiofréquences à antenne passive et la structure de ces transpondeurs radiofréquences.The invention relates to the field of passive antenna radio frequency transponders and the structure of these radio frequency transponders.
Plus particulièrement, l'invention concerne des supports à puce sans contact tel que des cartes à puce sans contact dont la communication est amplifiée par une antenne passive.More particularly, the invention relates to contactless chip carriers such as contactless smart cards whose communication is amplified by a passive antenna.
L'invention peut également viser des systèmes de documents de voyage électroniques sans contact tels que passeports électroniques et visas électroniques sous forme de transpondeurs disposés ensemble. En particulier, ces documents et visas sont conformes aux spécifications de l'ICAO (acronyme de l'expression anglo-saxonne "International Civil Aviation Organization") et norme ISO/IEC 14443.The invention may also be directed to contactless electronic travel document systems such as electronic passports and electronic visas in the form of transponders arranged together. In particular, these documents and visas comply with the specifications of ICAO (acronym for the English expression "International Civil Aviation Organization") and ISO / IEC 14443.
Le document
Ces supports ont l'inconvénient, avec une antenne principale passive à deux boucles en forme d'un huit, de présenter une construction complexe.These supports have the disadvantage, with a passive main antenna with two loops in the shape of an eight, to present a complex construction.
Le document
Le support obtenu a l'inconvénient de nécessiter une antenne passive dont la boucle principale s'étend sur la toute périphérie du support. En outre les constructions décrites ne permettent pas d'atteindre un niveau visé de performance conforme au standard ISO/IEC 14443.The support obtained has the disadvantage of requiring a passive antenna whose main loop extends over the entire periphery of the support. In addition, the constructions described do not achieve a target level of performance in accordance with ISO / IEC 14443.
On connait également un mode de réalisation de la société SPS (Smart Card Solutions) qui utilise un module à contact et à antenne disposé dans une cavité de corps de carte à puce bancaire. Ce module est couplé avec une antenne passive disposée sur presque toute la surface du corps de carte ; Il comprend des boucles sensiblement concentriques disposées en spirale autour de la cavité du module ; La première boucle adjacente à la cavité étant très large de plusieurs millimètres sous l'emplacement de la cavité de module voire 5 mm et les suivantes également pour permettre un embossage sur les spires sans risque de sectionner les spires à l'embossage. En outre, l'antenne est connectée à des plaques de condensateur métalliques disposées de part et d'autre du support d'antenne. La dernière spire s'étend en périphérie de la carte pour embrasser le plus de flux radiofréquence d'un lecteur.There is also known an embodiment of the company SPS (Smart Card Solutions) which uses a contact and antenna module disposed in a banking card body cavity. This module is coupled with a passive antenna disposed on almost the entire surface of the card body; It comprises substantially concentric loops arranged spirally around the module cavity; The first loop adjacent to the cavity being very wide by several millimeters under the location of the module cavity or even 5 mm and the following also to allow embossing on the turns without risk of cutting the turns to the embossing. In addition, the antenna is connected to metal capacitor plates disposed on either side of the antenna support. The last turn extends in the periphery of the card to embrace the most radiofrequency flow of a player.
Cette construction a l'inconvénient de présenter des risques de délamination dans la mesure où les feuilles plastiques constituant le corps de carte adhérent mal aux surfaces métalliques des spires de l'antenne et/ou des plaques de condensateur.This construction has the disadvantage of presenting risks of delamination insofar as the plastic sheets constituting the card body adheres poorly to the metal surfaces of the turns of the antenna and / or capacitor plates.
De plus, on connait une antenne passive selon
L'invention vise à résoudre les inconvénients précités.The invention aims to solve the aforementioned drawbacks.
En particulier, elle vise à améliorer les performances des dispositifs radiofréquences ou transpondeurs radiofréquences mettant en oeuvre une antenne passive tout en ayant une construction plus simple à réaliser de l'antenne passive.In particular, it aims to improve the performance of radiofrequency devices or radio frequency transponders using a passive antenna while having a simpler construction to achieve the passive antenna.
Elle vise également à mettre en oeuvre moins de surface métallique pour l'antenne passive et/ou le condensateur associé notamment pour éviter une délamination et/ou économie de surface conductrice.It also aims to implement less metal surface for the passive antenna and / or the associated capacitor in particular to avoid delamination and / or conductive surface economy.
A cet effet, l'invention a pour objet une antenne passive selon la revendication 1. De plus, l'invention a pour objet un dispositif radiofréquence comprenant une telle antenne passive destinée à être accordée en fréquence avec au moins un transpondeur,
- ledit transpondeur comprenant une puce de circuit intégré reliée à une interface à antenne définissant une périphérie de couplage électromagnétique,
- ladite antenne passive comprenant :
- une boucle principale formée de spires comprenant au moins une portion de surface à l'intérieur de la boucle,
- au moins un renfoncement de la boucle principale orienté de l'intérieur vers l'extérieur de la boucle principale, ladite portion de surface (B) étant localisée dans ledit renfoncement pour effectuer un couplage électromagnétique avec un circuit transpondeur ;
- said transponder comprising an integrated circuit chip connected to an antenna interface defining an electromagnetic coupling periphery,
- said passive antenna comprising:
- a main loop formed of turns comprising at least one surface portion inside the loop,
- at least one recess of the main loop oriented from the inside to the outside of the main loop, said surface portion (B) being located in said recess for electromagnetic coupling with a transponder circuit;
Selon d'autres caractéristiques du dispositif :
- Plusieurs spires de l'antenne passive s'étendent où sont destinées à s'étendre sensiblement à proximité et le long de l'interface à antenne du transpondeur (ou module radiofréquence) sur plus de la moitié de la périphérie ;
- Lesdites plusieurs spires de l'antenne passive sont positionnées ou destinées à être positionnées à l'aplomb des spires de ladite interface de module;
- Lesdites plusieurs spires de l'antenne passive s'étendent ou sont destinées à s'étendre sur plus des trois quarts de la périphérie de l'interface de module;
- Ledit renfoncement a la forme concave d'un « U » ou d'un « V » ouvert vers la surface interne de la boucle ;
- Le dispositif comprend ou est destiné à comprendre un premier transpondeur dans un module à contacts débouchant en surface du dispositif et un second transpondeur non débouchant ;
- Ledit premier transpondeur est conforme au standard ISO/IEC 14443 de type A et le second conforme au type B ;
- L'antenne passive s'étend sensiblement uniquement sur la moitié de la surface normalisée d'une carte bancaire ISO 7816 ; L'antenne passive s'étend en dehors d'une zone d'embossage ; La surface de couplage de l'antenne passive s'étend de préférence sur une surface qui est environ la moitié de la surface de la carte à puce ISO 7816, soit 81 x 25 mm ou moins ;
- Les branches parallèles externes du « U » sont espacées d'une distance comprise entre 5 mm à 15 mm ;
- Le renfoncement est destiné à se positionner à l'aplomb d'un module d'identification d'abonné (SIM) constituant un transpondeur radiofréquence ou étant de type NFC ; Le dispositif peut comprendre ou constituer un support souple positionnable autour d'un module d'identification d'abonné, notamment dans un boîtier de téléphone mobile pour améliorer le couplage avec un transpondeur radiofréquence ou NFC contenu dans le module.
- Several turns of the passive antenna extend where are intended to extend substantially in proximity and along the antenna interface of the transponder (or radio frequency module) on more than half of the periphery;
- Said plurality of turns of the passive antenna are positioned or intended to be positioned vertically above the turns of said module interface;
- Said plurality of turns of the passive antenna extend or are intended to extend over more than three quarters of the periphery of the module interface;
- Said recess has the concave shape of a "U" or a "V" open towards the inner surface of the loop;
- The device comprises or is intended to include a first transponder in a contact module opening on the surface of the device and a second non-debonding transponder;
- Said first transponder complies with the ISO / IEC 14443 standard of type A and the second one with type B;
- The passive antenna extends substantially only half of the normalized area of an ISO 7816 bank card; The passive antenna extends outside an embossing zone; The coupling surface of the passive antenna preferably extends over a surface that is about half the area of the ISO 7816 chip card, that is 81 x 25 mm or less;
- The external parallel branches of the "U" are spaced apart by a distance of between 5 mm and 15 mm;
- The recess is intended to be positioned vertically above a subscriber identification module (SIM) constituting a radio frequency transponder or being of the NFC type; The device may comprise or constitute a flexible support positionable around a subscriber identification module, in particular in a mobile phone housing to improve the coupling with a radio frequency transponder or NFC contained in the module.
Grâce à l'invention :
- Le motif d'antenne passive n'a pas besoin de présenter deux bobines fermées dont une est sensiblement concentrique avec l'antenne du module ;
- Une bonne fonctionnalité du produit est obtenue lors des tests ISO 14443-2 grâce au couplage optimisé entre l'antenne passive et celle du ou des modules ;
- Le renfoncement (forme concave de l'antenne ouverte vers l'intérieur de l'antenne) en U, V ou C permet de coupler avec une forme d'antenne passive à une seule bobine et avec une surface de couplage réduite de moitié pour permettre l'embossage sur une carte bancaire;
- L'invention assure un bon couplage avec une boucle moins étendue et moins de surface des spires ; Elle a l'avantage d'éviter un problème de délamination tout en libérant toute la surface d'embossage standard réservée à l'embossage ;
- L'invention permet de libérer de la surface occupée par l'antenne ; ainsi, une carte peut recevoir des éléments de personnalisation graphique tels que des fenêtres ou portions transparentes ;
- L'invention permet de rationaliser la production avec un seul type d'antenne passive pour plusieurs applications potentielles, l'antenne comportant plusieurs renfoncements sensiblement en forme de « U » ou « C » dont la surface de chaque renfoncement correspond sensiblement à la surface de chaque module.
- The passive antenna pattern does not need to present two closed coils, one of which is substantially concentric with the antenna of the module;
- A good functionality of the product is obtained during ISO 14443-2 tests thanks to the optimized coupling between the passive antenna and that of the module (s);
- The recess (concave form of the antenna open towards the inside of the antenna) in U, V or C makes it possible to couple with a passive antenna form to a single coil and with a coupling surface reduced by half to allow embossing on a bank card;
- The invention ensures a good coupling with a looser loop and less surface of the turns; It has the advantage of avoiding a problem of delamination while releasing all the standard embossing surface reserved for embossing;
- The invention makes it possible to release the surface occupied by the antenna; thus, a card can receive graphic personalization elements such as windows or transparent portions;
- The invention makes it possible to rationalize production with a single type of passive antenna for several potential applications, the antenna comprising several recesses substantially in the shape of "U" or "C" whose surface of each recess substantially corresponds to the surface of each module.
D'autres particularités et avantages de l'invention apparaîtront à la lecture de la description faite à titre d'exemple non limitatif et en regard des dessins annexés sur lesquels :
- Les
figures 1 illustrent une carte à puce à interface duale selon l'art antérieur ;et 2 - La
figure 3 illustre une carte à puce sans contact de l'art antérieur; - La
figure 4A illustre une vue schématique du dispositif qui n'est pas conforme à un mode de réalisation de l'invention; - La
figure 4B illustre une vue schématique d'une carte à puce comportant le dispositif de lafigure 4A ; - La
figure 4C illustre une vue schématique du renfoncement R de lafigure 4A ; - La
figure 5 illustre une vue schématique d'un autre mode qui n'est pas conforme à un mode de réalisation de l'invention revendiquée du renfoncement R de lafigure 4A ; - La
figure 6 illustre une vue schématique d'un mode de réalisation de l'invention revendiquée. - Les
figures 7a et 7b illustrent des modules radiofréquence. - La
figure 8 illustre un dispositif comportant deux renfoncements (R, R2) recevant chacun un transpondeur (22, 22b). Lesfigures 1-3 de l'art antérieur ont été décrites précédemment en introduction.
- The
Figures 1 and 2 illustrate a dual-interface smart card according to the prior art; - The
figure 3 illustrates a contactless smart card of the prior art; - The
Figure 4A illustrates a schematic view of the device that does not conform to an embodiment of the invention; - The
Figure 4B illustrates a schematic view of a smart card comprising the device of theFigure 4A ; - The
figure 4C illustrates a schematic view of the recess R of theFigure 4A ; - The
figure 5 illustrates a schematic view of another mode which does not conform to an embodiment of the claimed invention of the recess R of theFigure 4A ; - The
figure 6 illustrates a schematic view of an embodiment of the claimed invention. - The
Figures 7a and 7b illustrate radiofrequency modules. - The
figure 8 illustrates a device comprising two recesses (R, R2) each receiving a transponder (22, 22b). Thefigures 1-3 of the prior art have been described previously in the introduction.
Les antennes passives sont respectivement référencées (3, 4) et (13, 14). Elles comprennent respectivement une petite boucle (3, 13) et une grande boucle (4, 14).The passive antennas are respectively referenced (3, 4) and (13, 14). They respectively comprise a small loop (3, 13) and a large loop (4, 14).
A la
A la
Le dispositif comprend une antenne passive 24 accordée ou destinée à être accordée en fréquence avec au moins un transpondeur radiofréquence 22 ou 22B; Le transpondeur comprend une puce de circuit intégré radiofréquence 16 reliée à une interface à antenne 28 ou 36 (ici schématisée). Une spire externe 29 de l'interface à l'antenne 28 définit une périphérie P de la surface de couplage électromagnétique du transpondeur ; Le module comprend aussi une spire interne 30. Le transpondeur peut être dans l'exemple un module à interface duale 22 (antenne et plages de contact 36 en surface du corps de carte) ou un module sans-contact de carte à puce 22b (
D'une manière générale, dans le cadre de la présente description, on entend par transpondeur tout circuit électronique radiofréquence communicant à l'aide d'un champ électromagnétique et comportant une bobine connectée à un condensateur et/ou à un circuit intégré.Generally speaking, in the context of the present description, transponder is understood to mean any electronic radio-frequency circuit communicating with the aid of an electromagnetic field and comprising a coil connected to a capacitor and / or to an integrated circuit.
Les transpondeurs sont utilisés dans différents domaines économiques tels que le bancaire (porte-monnaie électronique), la communication, le transport, l'identité (e-passeport, ID-carte). Dans l'identité notamment, il est connu d'effectuer l'identification d'une personne par communication radiofréquence avec un objet électronique portable sans contact de type RFID.Transponders are used in different economic fields such as banking (electronic purse), communication, transport, identity (e-passport, ID-card). In the particular identity, it is known to perform the identification of a person by radio frequency communication with a contactless electronic object RFID-type contact.
Le module peut comprendre ou non un substrat isolant support des plages de contact et/ou de l'antenne. L'antenne passive peut être réalisée sur un substrat isolant par toute technique connue de l'homme de l'art notamment par incrustation de fil d'antenne, par gravure, par sérigraphie. Dans l'exemple, l'antenne est gravée.The module may or may not include an insulating substrate supporting the contact pads and / or the antenna. The passive antenna can be made on an insulating substrate by any technique known to those skilled in the art including by embedding antenna wire, by etching, by screen printing. In the example, the antenna is etched.
L'antenne passive 24 comprend une boucle principale unique formée d'au moins une ou plusieurs spires ; Elle comprend au moins une portion de surface (A) à l'intérieur de la boucle pour effectuer un couplage électromagnétique avec au moins un circuit transpondeur.The
De préférence, pour de meilleurs résultats de couplage et de performances satisfaisant notamment les tests du standard ISO/IEC 14443 plusieurs spires de l'antenne passive 24 s'étendent ou sont destinées à s'étendre sensiblement à proximité et le long de l'interface 28 des modules sur plus de la moitié de leur périphérie (P). C'est à dire qu'une portion du parcours des spires de l'antenne passive 24 définissant le recoin accompagne de très près et/ou est sensiblement parallèle au parcours des spires de l'interface à antenne 28 du transpondeur sur au moins une distance correspondant à la moitié de la longueur de la spire périphérique (29) P.Preferably, for better coupling results and satisfactory performance in particular the ISO / IEC 14443 standard tests, several turns of the
Dans l'exemple, s'agissant de module carte à puce, les des antennes 24 et 28 sont disposées à proximité immédiate l'une de l'autre, par exemple, séparées de moins d'un millimètre. Dans d'autres dispositifs par exemple clés USB, téléphone, cette proximité peut être plus importante par exemple de l'ordre de quelques millimètres voire un ou plusieurs centimètres.In the example, in the case of a smart card module, the
A la
Grâce aux dispositions ci-dessus, la communication radiofréquence de la carte avec un lecteur est améliorée et peut être conforme au standard ISO/IEC 14443 avec simplement la moitié de la surface d'une carte à puce standard ISO 7816.Thanks to the above provisions, the radiofrequency communication of the card with a reader is improved and can be in accordance with the ISO / IEC 14443 standard with just half the surface of an ISO 7816 standard smart card.
Le flux électromagnétique induit dans la surface (A) a le même sens que celui induit dans la surface B du renfoncement.The electromagnetic flux induced in the surface (A) has the same direction as that induced in the surface B of the recess.
L'antenne passive peut s'étendre sensiblement sur toute la longueur de la carte même au-delà du module (à gauche sur la figure).The passive antenna can extend substantially over the entire length of the card even beyond the module (left in the figure).
A la
Dans ce mode de réalisation, plusieurs spires de l'antenne passive s'étendent ou sont destinées à s'étendre sur les trois quarts ou plus de la périphérie de l'interface à antenne 28 du module.To the
In this embodiment, a plurality of turns of the passive antenna extend or are intended to extend over three quarters or more of the periphery of the
Alternativement, l'antenne passive peut entourer un peu plus le transpondeur ou l'emplacement 37 par une portion complémentaire sans toutefois fermer complètement la surface B et l'isoler de la surface A.Alternatively, the passive antenna can surround a little more the transponder or the
L'antenne passive peut être reliée à deux plaques de condensateur C1, C2 par exemple réalisées de part et d'autre du substrat de l'antenne (alternativement, la capacité peut être réalisée par une puce de circuit intégré). Un plot 40 fixé de part et d'autre du substrat permet par leur percement et déformation de connecter les deux plaques, elles-mêmes reliées à des extrémités de l'antenne passive.The passive antenna can be connected to two capacitor plates C1, C2 for example made on either side of the antenna substrate (alternatively, the capacitance can be achieved by an integrated circuit chip). A
Selon l'invention, l'antenne passive comprend dans le renfoncement R, une spire interne 33 élargie vers la médiatrice du renfoncement R.According to the invention, the passive antenna comprises, in the recess R, an internal turn 33 widened towards the perpendicular bisector of the recess R.
L'avantage est de pouvoir éventuellement usiner une cavité de module avec des tolérances de fabrication larges sans risque de couper la spire interne de l'antenne 24 ou 34 au niveau du recoin; Il est possible de prévoir ainsi plusieurs dimensions de cavité avec un même profil d'antenne passive. L'élargissement de la spire est ici uniquement dans ce renfoncement couvert par l'antenne du transpondeur.The advantage is to be able to possibly machine a module cavity with wide manufacturing tolerances without the risk of cutting the inner turn of the
Selon d'autres variantes de mise en oeuvre, l'invention prévoit de réaliser des capacités en série en multipliant les plaques superposées. Ces plaques ou grilles peuvent être formées avec un parcours continu d'un fil.According to other variants of implementation, the invention provides to achieve serial capabilities by multiplying the superimposed plates. These plates or grids can be formed with a continuous path of a wire.
Par ailleurs, l'invention prévoit de réaliser des plaques ou grilles superposées sur le parcours de spires d'antenne.Furthermore, the invention provides for making plates or grids superimposed on the path of antenna turns.
Ainsi, un assemblage série de condensateurs est obtenu, soit en superposant au moins trois grilles, soit en réalisant au moins deux condensateurs sur un parcours d'une même spire (ou d'une même piste conductrice si pas d'antenne).Thus, a series of capacitors is obtained, either by superimposing at least three grids, or by making at least two capacitors on a path of the same turn (or the same conductive track if no antenna).
Par exemple au cours de la réalisation d'une spire, l'outil de guidage de fil sur le substrat réalise une plaque en zigzag ou en forme de grille quelconque, puis le fil d'un second tour ou tour subséquent de spire réalise la seconde plaque et/ou autres plaques subséquentes pour avoir des condensateurs en série les un avec les autres.For example, during the production of a turn, the wire guiding tool on the substrate makes a plate in zigzag or any grid shape, then the wire of a second or subsequent turn of turn turns the second plate and / or other subsequent plates to have capacitors in series with each other.
L'avantage de condensateur en série est de gagner de la surface consacrée aux plaques.The advantage of series capacitor is to gain the area devoted to the plates.
Alternativement, après avoir réalisé une première plaque, l'invention prévoit de réaliser la seconde plaque ou nième plaque dans la foulée de la première avec un fil continu, par exemple en faisant repasser le fil sur la grille qui vient d'être formée avant de poursuivre le parcours d'antenne.Alternatively, after making a first plate, the invention provides for making the second plate or nth plate in the wake of the first with a continuous wire, for example by ironing the wire on the grid which has just been formed before continue the antenna route.
Les grilles superposées formant condensateur peuvent être ajustées en coupant un fil selon la valeur de capacité désirée. Par exemple, si une portion de grille terminale est désaccouplée du circuit par sectionnement d'un fil à un endroit de la grille ou conduisant à la grille, c'est autant de capacité qui est désactivée. Autre exemple, si une portion terminale de grille contient N lignes croisant N autres lignes comme à la
Le tableau ci-dessous indique les résultats obtenus avec une antenne passive selon la
L'invention permet d'avoir une antenne universelle pour trois utilisations possibles : une version à deux modules, une version avec un seul module à interface duale et une version à un module sans contact. Ainsi, on peut réduire les stocks et rationaliser la production avec un seul type d'antenne pour plusieurs utilisations.The invention makes it possible to have a universal antenna for three possible uses: a version with two modules, a version with a single module with dual interface and a version with a contactless module. Thus, we can reduce inventory and streamline production with one type of antenna for multiple uses.
Le tableau indique les valeurs obtenues pour les bandes latérales haute (USB) et basse (LSB). L'antenne passive peut est une antenne gravée de manière classique ; Elle possède les caractéristiques suivantes :
- Nombre de tours : 4
- Inductance : 3,2µH
- Impédance : 3,1 Ohm
- C : env. 53pF
- Number of laps: 4
- Inductance: 3.2μH
- Impedance: 3.1 Ohm
- C: approx. 53pF
Claims (14)
- A passive antenna (24) comprising:- a main loop (24) formed of turns,- one recess (R) of the main loop oriented from the interior to the exterior of the main loop, intended to receive a transponder (22),characterized in that the antenna comprises, in said recess, an internal turn (33) expanded towards the right bisector of the recess.
- A radiofrequency device comprising a passive antenna (24) according to the preceding claim, with said antenna being tuned or intended to be tuned in frequency with at least one transponder (22, 22b),- said transponder comprising an integrated circuit chip (16) connected to an antenna interface (28) defining an electromagnetic coupling surface periphery (P),- said main loop (24) formed of turns comprising at least one portion of surface (B) inside the loop,- at least one recess (R, R2) of the main loop being oriented from the interior to the exterior of the main loop,characterized in that said portion of surface (B) is located in said recess (R, R2) so as to effect an electromagnetic coupling with a transponder circuit.
- A device according to the preceding claims, characterized in that several turns of the passive antenna extend or are intended to extend substantially near and along (Dm, Cm, Em) the antenna interface (28) over more than half the periphery (P).
- A device according to claims 2 to 3, characterized in that said plurality of turns of the passive antenna (24) are positioned or intended to be positioned directly above turns of said antenna interface (28).
- A device according to any one of claims 2 to 4, characterized in that said plurality of turns of the passive antenna (24) extend or are intended to extend over more than three quarters of the periphery (P) of the antenna interface (28).
- A device according to any one of claims 2 to 5, characterized in that said recess (R, R2) has the shape of a "U" or a "V" or a "C" oriented towards the internal surface of the passive antenna (24).
- A device according to any one of claims 2 to 6, characterized in that it comprises two recesses (R, R2) receiving or intended to receive one transponder (22, 22b) each.
- A device according to the preceding claim, characterized in that it comprises or is intended to comprise a first transponder (22) in a contact module (36) opening at the surface of the device and a second non-through transponder.
- A device according to the preceding claim, characterized in that said first transponder (22) conforms to the ISO/IEC 14443 standard of the A type and the second one (22b) conforms to the B type or vice versa.
- A device according to any one of the preceding claims, characterized in that the coupling surface of the passive antenna (A) preferably extends over a surface which is approximately half the surface of the ISO 7816 smart card, i.e. 81x25mm or less.
- A device according to the preceding claim, characterized in that the passive antenna (24) extends outside an embossing zone (EMB).
- A device according to any one of claims 2 to 11, characterized in that the external parallel branches (Cp, Ep) of the "U" are spaced by 5mm to 15mm.
- A device according to any one of claims 2 to 12, characterized in that the recess (R, R2) is intended to be positioned right above a subscriber identification module (SIM) composing an RF or NFC transponder.
- A device according to any one of claims 2 to 13, characterized in that it comprises a single transponder positioned right above one of the recesses.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16173819.0A EP3104308A1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
EP12720528.4A EP2710523B1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
PL12720528T PL2710523T3 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11305594A EP2525304A1 (en) | 2011-05-17 | 2011-05-17 | Radiofrequency transponder device with passive optimised resonant circuit |
EP12720528.4A EP2710523B1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
PCT/EP2012/059024 WO2012156403A1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16173819.0A Division EP3104308A1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
EP16173819.0A Division-Into EP3104308A1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
Publications (2)
Publication Number | Publication Date |
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EP2710523A1 EP2710523A1 (en) | 2014-03-26 |
EP2710523B1 true EP2710523B1 (en) | 2016-08-17 |
Family
ID=46062306
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11305594A Withdrawn EP2525304A1 (en) | 2011-05-17 | 2011-05-17 | Radiofrequency transponder device with passive optimised resonant circuit |
EP12720528.4A Active EP2710523B1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
EP16173819.0A Ceased EP3104308A1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11305594A Withdrawn EP2525304A1 (en) | 2011-05-17 | 2011-05-17 | Radiofrequency transponder device with passive optimised resonant circuit |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16173819.0A Ceased EP3104308A1 (en) | 2011-05-17 | 2012-05-15 | Radiofrequency transponder device with passive resonant circuit |
Country Status (8)
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US (1) | US9104954B2 (en) |
EP (3) | EP2525304A1 (en) |
JP (2) | JP2014515151A (en) |
CN (1) | CN103649970B (en) |
ES (1) | ES2617256T3 (en) |
PL (1) | PL2710523T3 (en) |
PT (1) | PT2710523T (en) |
WO (1) | WO2012156403A1 (en) |
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EP1932104B1 (en) | 2005-08-30 | 2012-11-07 | Smart Packaging Solutions (SPS) | Double interface communication electronic module, in particular for a chip card |
US8317108B2 (en) | 2007-03-29 | 2012-11-27 | Smart Packaging Solutions (Sps) | Chip card with dual communication interface |
Also Published As
Publication number | Publication date |
---|---|
EP3104308A1 (en) | 2016-12-14 |
JP2016178663A (en) | 2016-10-06 |
WO2012156403A1 (en) | 2012-11-22 |
CN103649970B (en) | 2018-06-01 |
CN103649970A (en) | 2014-03-19 |
ES2617256T3 (en) | 2017-06-16 |
EP2525304A1 (en) | 2012-11-21 |
JP2014515151A (en) | 2014-06-26 |
US20140131453A1 (en) | 2014-05-15 |
PL2710523T3 (en) | 2017-05-31 |
PT2710523T (en) | 2016-11-16 |
US9104954B2 (en) | 2015-08-11 |
EP2710523A1 (en) | 2014-03-26 |
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